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Policy CSP - AttachmentManager

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Tip

This CSP contains ADMX-backed policies which require a special SyncML format to enable or disable. You must specify the data type in the SyncML as <Format>chr</Format>. For details, see Understanding ADMX-backed policies.

The payload of the SyncML must be XML-encoded; for this XML encoding, there are a variety of online encoders that you can use. To avoid encoding the payload, you can use CDATA if your MDM supports it. For more information, see CDATA Sections.

DoNotPreserveZoneInformation

Scope Editions Applicable OS
❌ Device
✅ User		 ✅ Pro
✅ Enterprise
✅ Education
✅ Windows SE
✅ IoT Enterprise / IoT Enterprise LTSC		 ✅ Windows 10, version 1703 [10.0.15063] and later 
./User/Vendor/MSFT/Policy/Config/AttachmentManager/DoNotPreserveZoneInformation

This policy setting allows you to manage whether Windows marks file attachments with information about their zone of origin (such as restricted, Internet, intranet, local). This requires NTFS in order to function correctly, and will fail without notice on FAT32. By not preserving the zone information, Windows can't make proper risk assessments.

  • If you enable this policy setting, Windows doesn't mark file attachments with their zone information.

  • If you disable this policy setting, Windows marks file attachments with their zone information.

  • If you don't configure this policy setting, Windows marks file attachments with their zone information.

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name Value
Name AM_MarkZoneOnSavedAtttachments
Friendly Name Do not preserve zone information in file attachments
Location User Configuration
Path Windows Components > Attachment Manager
Registry Key Name Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
Registry Value Name SaveZoneInformation
ADMX File Name AttachmentManager.admx

HideZoneInfoMechanism

Scope Editions Applicable OS
❌ Device
✅ User		 ✅ Pro
✅ Enterprise
✅ Education
✅ Windows SE
✅ IoT Enterprise / IoT Enterprise LTSC		 ✅ Windows 10, version 1703 [10.0.15063] and later 
./User/Vendor/MSFT/Policy/Config/AttachmentManager/HideZoneInfoMechanism

This policy setting allows you to manage whether users can manually remove the zone information from saved file attachments by clicking the Unblock button in the file's property sheet or by using a check box in the security warning dialog. Removing the zone information allows users to open potentially dangerous file attachments that Windows has blocked users from opening.

  • If you enable this policy setting, Windows hides the check box and Unblock button.

  • If you disable this policy setting, Windows shows the check box and Unblock button.

  • If you don't configure this policy setting, Windows hides the check box and Unblock button.

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name Value
Name AM_RemoveZoneInfo
Friendly Name Hide mechanisms to remove zone information
Location User Configuration
Path Windows Components > Attachment Manager
Registry Key Name Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
Registry Value Name HideZoneInfoOnProperties
ADMX File Name AttachmentManager.admx

NotifyAntivirusPrograms

Scope Editions Applicable OS
❌ Device
✅ User		 ✅ Pro
✅ Enterprise
✅ Education
✅ Windows SE
✅ IoT Enterprise / IoT Enterprise LTSC		 ✅ Windows 10, version 1703 [10.0.15063] and later 
./User/Vendor/MSFT/Policy/Config/AttachmentManager/NotifyAntivirusPrograms

This policy setting allows you to manage the behavior for notifying registered antivirus programs. If multiple programs are registered, they will all be notified. If the registered antivirus program already performs on-access checks or scans files as they arrive on the computer's email server, additional calls would be redundant.

  • If you enable this policy setting, Windows tells the registered antivirus program to scan the file when a user opens a file attachment. If the antivirus program fails, the attachment is blocked from being opened.

  • If you disable this policy setting, Windows doesn't call the registered antivirus programs when file attachments are opened.

  • If you don't configure this policy setting, Windows doesn't call the registered antivirus programs when file attachments are opened.

Description framework properties:

Property name Property value
Format chr (string)
Access Type Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name Value
Name AM_CallIOfficeAntiVirus
Friendly Name Notify antivirus programs when opening attachments
Location User Configuration
Path Windows Components > Attachment Manager
Registry Key Name Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
Registry Value Name ScanWithAntiVirus
ADMX File Name AttachmentManager.admx

Policy configuration service provider